Can you think of any three-dimensional shape that comprises of exactly two surfaces?

A new clothing store has a unique method of pricing items. A vest costs $20, a tie costs $15, a blouse costs $30, and underwear costs $45. How much would pants cost?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

why number 8549176320 is one of a kind?

Can you replace the question mark with the correct number in the below table sequence?

Spot 5 differences in two Christmas tree below:

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

What Time Should the last watch show in the below figure?

Find the missing number in the sequence below:

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?